package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;
    //新增套餐
    @Override
    @Transactional
    public void addMeal(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        //拷贝套餐属性
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //向套餐表中插入一条数据
        setmealMapper.insert(setmeal);
        //获取当前插入的套餐的id，因为菜品里面有套餐id，需要用到
        Long setmealId = setmeal.getId();
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (setmealDishes != null && setmealDishes.size() > 0) {
            for (SetmealDish setmealDish : setmealDishes) {
                setmealDish.setSetmealId(setmealId);//设置当前菜品是哪个套餐的id
            }
            setmealDishMapper.insertSetmealDish(setmealDishes);
        }


    }
    //套餐分页查询
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    //批量删除套餐
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getByIdWithDish(id);
            if(setmeal.getStatus() == StatusConstant.ENABLE){
                //起售的套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }

        setmealMapper.deleteBatch(ids); //删除套餐表数据
        setmealDishMapper.deleteBySetmealId(ids);//删除套餐和菜品的关联数据


    }

    //根据id查询套餐
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        SetmealVO setmealVO = new SetmealVO();
        //查询套餐数据
        Setmeal setmeal = setmealMapper.getByIdWithDish(id);
        BeanUtils.copyProperties(setmeal,setmealVO);
        //查询套餐菜品数据
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }
    //修改套餐
    @Transactional
    @Override
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //修改套餐数据
        setmealMapper.update(setmeal);
        //删除套餐和菜品的关联数据,然后再添加
        Long id = setmealDTO.getId();
        List<Long> dishIds = new ArrayList<>();
        dishIds.add(id);
        //删除套餐食物关系表
        setmealDishMapper.deleteBySetmealId(dishIds);
        //重新插入新的关联数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> setmealDish.setSetmealId(id));//设置套餐id
        setmealDishMapper.insertSetmealDish(setmealDishes);
    }
    //起售停售套餐
    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断当前套餐内是否有停售的菜品
        if(status == StatusConstant.ENABLE){
            List<Long> dishIds = dishMapper.getBySetmealID( id);
            if(dishIds != null && dishIds.size() > 0){
                for (Long dishId : dishIds) {
                    Dish dish = dishMapper.getById(dishId);
                    if(dish.getStatus() == StatusConstant.DISABLE){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                }
            }
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }
    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }
    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }



}









